Postingan
Threat Level - Intermediate to Severe
What is a computer virus? A computer virus is a piece of malicious code that adds itself to other existing programs, including operating systems. Computer viruses spread quickly and wreck havoc on computer systems. Including potential destruction of operating systems and data.
There are different types of viruses and they range from being a nuisance that constantly displays pop-ups to being a real severe danger that deletes system files, attaches to registries, destroys ability to log into the Internet and even destroying the computer's operating system along with all the data that is on it. Unless you have completely backed-up the data on your laptop, recovering that data will be impossible if you have to re-install the operating system after a virus infection.
While there are hundreds of different types of viruses with various levels of dangers, one of the most dangerous is the Trojan Horse, all though threat severity levels vary with the different types of Trojans, basically they are all dangerous and should always be protected against. Unfortunately some Trojans infect computers and cause such damage that it becomes irreversible and a reinstall of the entire operating system becomes necessary.
Many viruses slow down computer performance tremendously and especially Internet Browsers, there are other causes however for slow computers so do not assume that it is a virus. The best way to detect if you have a virus is by installing and running anti-virus software.
The best protection against computer viruses is prevention, early detection and removal. A good anti-virus or Malware removal program can protect computers and provide peace of mind when surfing the net.
You can read a guide to anti-virus protection software including all details and reviews of free and paid Anti-Virus programs and my top picks by clicking on Related Links Below.
LIST OF COMPUTER VIRUSES
Abraxas ( COMPUTER VIRUSES )
Abraxas, also known as Abraxas5, discovered in April 1993, is an encrypted, overwriting, file infecting computer virus which infects .COM and .EXE files, although it does not infect command.com. It does not become memory resident. Each time an infected file is executed, Abraxas infects the copy of dosshell.com
located in the C:\DOS directory (creating the file if it doesn't exist), as well as one EXE file in the current directory. Due to a bug in the virus, only the first EXE file in any directory is infected.
Abraxas-infected files will become 1,171 bytes in length contain Abraxas' viral code. The file's date and time in the DOS disk directory listing will be set to the system date and time when infection occurred. The following text strings can be found within the viral code in all Abraxas infected programs:
"*.exe c:\dos\dosshell.com .. MS-DOS (c)1992"
"->>ABRAXAS-5<<--"
"...For he is not of this day"
"...Nor he of this mind"
Execution of infected programs will also result in the display of a graphic "ABRAXAS" on the system display, accompanied by an ascending scale being played on the system speaker.
Abraxas was created with the PS-MPC virus creation tool, which can be used to create similar, easily detected viruses, which are usually encrypted as well.
Acid ( computer virus )
Acid is a computer virus which infects .COM and .EXE files including command.com. Each time an infected file is executed, Acid infects all of the .EXE files in the current directory. Later, if an infected file is executed, it infects the .COM files in the current directory. Programs infected with Acid will have had the first 792 bytes of the host program overwritten with Acid's own code. There will be no file length increase unless the original host program was smaller than 792 bytes, in which case it will become 792 bytes in length. The program's date and time in the DOS disk directory listing will not be altered.
The following text strings are found in infected files:
- "*.EXE *.COM .."
- "Program too big to fit in memory"
- "Acid Virus"
- "Legalize ACiD and Pot"
- "By: Copyfright Corp-$MZU"
Acme is a computer virus which infects EXE files. Each time an infected file is executed, Acme may infect an EXE in the current directory by creating a hidden 247 byte long read-only COM file with the same base name. (In DOS, if the file extension is not specified, and two files with the same base name exist, one with .COM and one with .EXE, the .COM file will always be executed first.) Acme is a variant of Clonewar, a spawning virus. Acme is also perhaps a descendant of the small single-step infector Zeno, which is not to be confused with the Zeno programming language.
AGI-Plan ( computer virus )
AGI-Plan was a memory resident DOS file infector first isolated at the Agiplan software company in Germany. Because of CARO standards that dictate that viruses should not be named after companies, AGI-Plan's technical name is Month 4-6. This name also violates CARO standards, but a more minor rule involving syntax. AGI-Plan is related to the Zero Bug virus, as both it and AGI-Plan prepend 1,536 bytes to files they infect.
AGI-Plan is not initially damaging until several months after the initial infection, hence its name. After activation, AGI-Plan will begin to corrupt write operations, which results in slow, difficult-to-notice damage overtime.
AGI-Plan is notable for reappearing in South Africa in what appeared to be an intentional re-release several years after. AGI-Plan never succeeded in spreading significantly beyond the isolated incidents in Germany and South Africa.
Actifed ( computer virus )Actifed is a G2-generated encrypted computer virus which infects .COM and .EXE files but not command.com. The virus is loaded into memory by executing an infected program and then affects the computer's runtime operation and corrupts program files.
It is interesting that G2 is a computer virus creation tool written by Dark Angel of the Phalcon/Skism organisation. This organization also wrote the "Phalcon-Skism Mass Produced Code Generator" [PS-MPC] which was used in the creation of Abraxas and numerous other viruses.
G2 generates compact, easily modified, fully commented, source code of .COM and .EXE infectors. It also supports the creation of resident and non-resident encrypted and non-encrypted viruses. The PS-MPC has similar use.
******OPRAH WINFREY VIRUS: Your 200MB hard drive suddenly shrinks to 80MB, and then slowly expands back to 200MB.
AT&T VIRUS: Every three minutes it tells you what great service you are getting.
MCI VIRUS: Every three minutes it reminds you that you're paying too much for the AT&T virus.
PAUL REVERE VIRUS: This revolutionary virus does not horse around. It warns you of impending hard disk attack---once if by LAN, twice if by C:>.
POLITICALLY CORRECT VIRUS: Never calls itself a "virus", but instead refers to itself as an "electronic microorganism."
RIGHT TO LIFE VIRUS: Won't allow you to delete a file, regardless of how old it is. If you attempt to erase a file, it requires you to first see a counselor about possible alternatives.
ROSS PEROT VIRUS: Activates every component in your system, just before the whole darn thing quits.
MARIO CUOMO VIRUS: It would be a great virus, but it refuses to run.
TED TURNER VIRUS: Colorizes your monochrome monitor.
ARNOLD SCHWARZENEGGER VIRUS: Terminates and stays resident. It'll be back.
DAN QUAYLE VIRUS #2: Their is sumthing rong wit your komputer, ewe jsut cant figyour out watt!
GOVERNMENT ECONOMIST VIRUS: Nothing works, but all your diagnostic software says everything is fine.
NEW WORLD ORDER VIRUS: Probably harmless, but it makes a lot of people really mad just thinking about it.
FEDERAL BUREAUCRAT VIRUS: Divides your hard disk into hundreds of little units, each of which does practically nothing, but all of which claim to be the most important part of your computer.
GALLUP VIRUS: Sixty percent of the PCs infected will lose 38 percent of their data 14 percent of the time. (plus or minus a 3.5 percent margin of error.)
TERRY RANDALL VIRUS: Prints "Oh no you don't" whenever you choose "Abort" from the "Abort" "Retry" "Fail" message.
TEXAS VIRUS: Makes sure that it's bigger than any other file.
ADAM AND EVE VIRUS: Takes a couple of bytes out of your Apple.
CONGRESSIONAL VIRUS: The computer locks up, screen splits erratically with a message appearing on each half blaming the other side for the problem.
AIRLINE VIRUS: You're in Dallas, but your data is in Singapore.
FREUDIAN VIRUS: Your computer becomes obsessed with marrying its own motherboard.
PBS VIRUS: Your programs stop every few minutes to ask for money.
ELVIS VIRUS: Your computer gets fat, slow and lazy, then self destructs; only to resurface at shopping malls and service stations across rural America.
OLLIE NORTH VIRUS: Causes your printer to become a paper shredder.
NIKE VIRUS: Just does it.
SEARS VIRUS: Your data won't appear unless you buy new cables, power supply and a set of shocks.
JIMMY HOFFA VIRUS: Your programs can never be found again.
CONGRESSIONAL VIRUS #2: Runs every program on the hard drive simultaneously, but doesn't allow the user to accomplish anything.
KEVORKIAN VIRUS: Helps your computer shut down as an act of mercy.
IMELDA MARCOS VIRUS: Sings you a song (slightly off key) on boot up, then subtracts money from your Quicken account and spends it all on expensive shoes it purchases through Prodigy.
STAR TREK VIRUS: Invades your system in places where no virus has gone before.
HEALTH CARE VIRUS: Tests your system for a day, finds nothing wrong, and sends you a bill for $4,500.
GEORGE BUSH VIRUS: It starts by boldly stating, "Read my docs....No new files!" on the screen. It proceeds to fill up all the free space on your hard drive with new files, then blames it on the Congressional Virus.
CLEVELAND INDIANS VIRUS: Makes your 486/50 machine perform like a 286/AT.
LAPD VIRUS: It claims it feels threatened by the other files on your PC and erases them in "self defense".
CHICAGO CUBS VIRUS: Your PC makes frequent mistakes and comes in last in the reviews, but you still love it.
ORAL ROBERTS VIRUS: Claims that if you don't send it a million dollars, it's programmer will take it back. >>
